Tube-scraper.



No. 828,189. PATENTED AUG.7, 1906.

G. H. BURPEB.

TUBE SGRAPER.

APPLIOATION FILED MAY 1. 1905.

2 SHEETS-SHEBT 1.

PATENTED AUG. 7, 1906.

G. H. BURPEE.

TUBE SGRAPER.

APPLICATION FILED MAY 1, 1906.

2 SHEETS-SHEET 2.

= Ell THE Ncmzrs PETERS 041., WASHINGTON, n. c.

UNITED STATES PATENT OFFICE.

H. BURPEE, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO B. F. 'STURTEVANTCOMPANY, OF HYDE PARK, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

TUBE-SCRAPER.

Patented Aug. 7, 1906.

Application filed May 1, 1905. Serial No. 258.264-

To all whom it may concern.-

Be it known that I, GEORGE H. BURPEE, a citizen of the United States,residing in Philadelphia, Pennsylvania, have invented certainImprovements in Tube Scrapers, of which the following is aspecification.

My invention consists in certain improvements in the scrapers used forremoving soot from the surfaces of the circulating-tubes of a feed-waterheater or fuel-economizer.

The object of my invention is to improve the construction of thescrapers and to properly guide them as they are reciprocated in contactwith the tubes.

In the accompanying drawings, Figure 1 is a side view of sufficient of afuel-economizer to illustrate my invention. Fig. 2 is a sectional planview on the line 2 2, Fig. 1. Fig. 3 is an enlarged sectional view ofone of the scrapers and the frame. Fig. 4 is a perspective view of oneof the scrapers. Fig. 5 is a perspective View of the guide; and Fig. 6is a sectional plan view on the line 6 6, Fig. 1.

A A are the tubes of the fuel-economizer, B and D are the upper andlower headers, respectively, of the said economizer, and C is asupporting-frame carrying the mechanism D for reciprocating thescrapers. This particular mechanism is fully shown and claimed in apatent granted to me, No. 733,141, dated July 7, 1903, and theparticular form of economizer is also shown in a patent, No. 729,273,

granted to me May 26, 1903. E E are the frames supporting the scrapersF, and they are hung from rods G, passing through suitable openings inthem and attached to the ends of a chain (1, passing around thechain-wheel D of the operating mechanism D. Said rods G are held totheir respective frames by pins 9- g, the upper end of each rod beingattached to one end of the chain d. Sliding on the lower portion of therod is'a bearing-plate G, Fig. 5, which is made in the manner shown soas to be guided by two adjoining tubes A, Fig. 6. This plate G isarranged so that the bar G can slide through it, and a pin g is providedto prevent said plate being detached from said bar.

When either of the frames E or E is at its lowest position, as shown inFig. 1, the guideplateG simply rests upon the lower header D while therod G passes down through the plate. On the upward movement of the framethe rod passes through the plate until the pin 9 strikes it, when saidrod carries said plate with it, thereby causing the latter to act at alltimes as a guide for the rod G. The scraper-frames are made in two partse e, secured together by bolts 6 The tubes A are staggered, as shown inFig. 2, one set of tubes being opposite the spaces between the other setof tubes.

On the lower section E of the frame 6 are arms e which extend betweenadjoining tubes. These arms are forked at their outer ends, and in eachfork is a recess for the reception of a lug f, projecting from onesection of the segmental scraper F, there being also a recess for one ofsaid scraper-lugs in the bar 6, adjacent to each of the tubes. There arein the present instance three scrapers for each tube, and these areshaped, as shown in Figs. 3 and 4, so that both the upper and lowerportions of each scraper bear upon the surface thereof.

Alternating with the arms e and project ing from the opposite side ofthe scraperframes are arms 6 also forked and recessed for the receptionof the lugs f on the scrapers F.

The section 6 of the scraper-frame E is shaped like the lower section 6,so that when it is placed above the latter and secured thereto it willhold the several scrapers in position, while allowing them sufficientfreedom to permit them to accommodate themselves to the tubes. By thisconstruction I am enabled to make a very strong and substantial framefor the scrapers and at the same time provide means for steadying thebar to which the scrapers are attached.

I claim as my invention 1. In a tube-scraper, the combination of aframe, a scraper or scrapers carried thereby, a rod attached to theframe, means connected to the rod for reciprocating said frame, andmeans on said rod constructed to engage the tubes for'guiding the frame,said means being movable relatively to said rod, substantially asdescribed.

2. In a tube-scraper, the combination of a frame, a scraper or scraperscarried thereby, a rod attached to the frame having a guide constructedto engage the tubes and provided with means whereby its motionislimited,

with means connected to said rod for reciprorelatively to the rod,substantially as deto eating the frame, the rod being movablerelascribed.

tively to its guide, substantially as de- In testimony whereof I havesigned my scribed. name to this specification in the presence of 3. In atube-scraper, the combination of a two subscribing witnesses.

frame, a scraper or scrapers carried thereby, GEORGE H. BURPEE.

a rod passing through the frame, and a guide- Witnesses:

plate on the rod below the frame constructed WALTER CHrsM,

to engage the tubes, said plate being movable J 0s. H. KLEIN.

